## Engineering Thermodynamics For a perfect gas, according to Boyle’s law (where P = Absolute pressure, V = Volume and T = Absolute temperature)

P v = constant, if T is kept constant
T/P = constant, if v is kept constant
P/T = constant, if v is kept constant
V/T = constant, if p is kept constant

## Engineering Thermodynamics A closed system is one in which

Both energy and mass cross the boundaries of the system
Neither mass nor energy crosses the boundaries of the system
Mass crosses the boundary but not the energy
Mass does not cross boundaries of the system, though energy may do so

## Engineering Thermodynamics An open system is one in which

Mass crosses the boundary but not the energy
Both energy and mass cross the boundaries of the system
Mass does not cross boundaries of the system, though energy may do so
Neither mass nor energy crosses the boundaries of the system

## Engineering Thermodynamics Addition of heat at constant pressure to a gas results in

Raising its temperature and doing external work
Raising its pressure
Raising its volume
Raising its temperature

## Engineering Thermodynamics An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

Impossible
Feasible
Possible, but with lot of sophistications
Possible